海面风场资料在广东省阳江海上风电场区域的适用性  

Applicability Analysis of Sea Surface Wind Field Data for Yangjiang Offshore Wind Farm in Guangdong Province

作　　者：黄穗 蔡彦枫 王俊 周川 HUANG Sui;CAI Yanfeng;WANG Jun;ZHOU Chuan(China Energy Engineering Group Guangdong Electric Power Design Institute Co.,Ltd.,Guangzhou 510663,Guangdong,China;Guangdong Kenuo Surveying Engineering Co.,Ltd.,Guangzhou 510663,Guangdong,China)

机构地区：[1]中国能源建设集团广东省电力设计研究院有限公司,广东广州510663 [2]广东科诺勘测工程有限公司,广东广州510663

出　　处：《南方能源建设》2024年第6期111-123,共13页Southern Energy Construction

基　　金：广东省级促进经济高质量发展海洋专项“海上风电桩基础及海缆稳定性动态监测一体化设备研发”(GDNRC[2021]41);中国能建广东院科技项目“广东省海上风电海洋水文气象信息预报关键技术研究”(GSKJ2-W01-2021)。

摘　　要：[目的]为了检验海面风场资料集在阳江海上风电场区域的适用性,文章对卫星反演资料(DASCAT)和再分析资料(ERA5、FNL)的10 m风场进行了检验评估。[方法]基于广东省阳江海上风电区域内4个站点实测10 m风场开展研究。[结果]分析表明:(1)风速相关性达0.8以上,ERA5均最高。风速均方根误差在2.6 m/s以内,浅水区中DASCAT最优,深水区中ERA5最优。FNL和ERA5在浅水区中出现显著的风速低估现象,DASCAT风速平均偏差数值小于FNL和ERA5,其平均风速与实测更接近;(2)风向相关性达0.75以上,浅水区中ERA5最高,深水区中FNL最高。风向均方根误差在35°以内,ERA5误差均最小,但DASCAT和FNL更接近实测主导风向;(3)各风速段下风速均方根误差统计表明:浅水区中,FNL在低风速段最小,DASCAT在中、高风速段最小;深水区中,ERA5在全风速段内均最小。对于风速相关性,浅水区和深水区中,ERA5在低、中风速段均最高,FNL在高风速段均最高;(4)浅水区内DASCAT和ERA5风速逐月误差较小且分布比较接近,4~5月和10月为峰值;深水区内ERA5误差最小,7月为峰值,12月~次年1月为谷值;(5)10 m多年平均风速分布特征均表现为风速自北向南、自西向东递增,在浅水区以内风速梯度较大。[结论]总体而言,ERA5的10 m海面风场资料集在研究区域内表现较好,其平均风速系统性偏低的不足可以通过DASCAT进行修正。[Introduction] In order to test the applicability of sea surface wind field data set in Yangjiang offshore wind farm area,this paper tests and evaluates the 10 m wind field of daily gridded advanced scatterometer(DASCAT),European centre for medium-range weather forecasts reanalysis v5(ERA5) and final reanalysis data(FNL).[Method] The research was based on the 10 m wind fields at four sites in the Yangjiang offshore wind farm area in Guangdong province.[Result] The results demonstrate five pionts:(1) The wind speed correlations are above 0.8,with ERA5 the highest.The RMSE of wind speed are within 2.6 m/s,with DASCAT being the best in SWZ and ERA5 being the best in DWZ.Both FNL and ERA5 show significant underestimation of wind speed in SWZ,while DASCAT has smaller mean wind speed deviation than those of FNL and ERA5,and ERA5 mean wind speed is closer to those of observation.(2) The wind direction correlation reaches more than 0.75,with ERA5 being the highest in SWZ and FNL being the highest in DWZ.The RMSE of wind direction are within 35°,and ERA5 errors are the minimum.However,DASCAT and FNL are both closer to the observed predominant wind direction.(3) The statistics of the RMSE of wind speed in each wind speed period show that FNL is the minimum in the low wind speed period while DASCAT is the minimum in the medium and high wind speed periods in SWZ.ERA5 is the minimum in all wind speed period in DWZ.In both SWZ and DWZ,ERA5 has the highest wind speed correlation in both the low and medium wind speed periods,and FNL has the highest wind speed correlation in the high wind speed period.(4) The monthly wind speed errors of DASCAT and ERA5 are small and distributed relatively close to each other in SWZ,with peaks in April-May and October;ERA5 errors are smallest in DWZ,with a peak in July and a trough in December-January of the following year.(5) The distribution characteristics of the multi-year average wind speed for 10 m show that the wind speed increases from north to south and from west to east,and the wind sp

关 键 词：海面风场 海上风电 DASCAT ERA5 FNL 适用性研究 

分 类 号：TK89[动力工程及工程热物理—流体机械及工程] P413[天文地球—大气科学及气象学]